Telegraphic relay



(No Model.)

T. COCHRAN.

ATELFGMPHIG RELAY. No. 272,210. Patented Peb. 13,1883.

rUNITED STATESv PATENT Orrtce.

THOMAS COCHRAN, OF BROOKLYN, NEV YORK.

TELEGRAPHlC RELAY.

SPECFCATION forming part of Letters Patent No. 272,210, dated February13, 1883.

Application tiled September 6. 1880.

To all w/tom 'it may concern Be it known that 1, THOMAS CocHaAN,acitizen ot' the United States, resid ing at Brooklyn, in thecounty ofKings and State of New York, have invented new and useful improvementsin Telegraphic Relays, of which the following is a specification.

This invention relates to improvements in telegraphic relays, and hasfor its object to secure perfect action of the instrument and to providenovel means for adjusting the retractile force ofthe armature.

The present invention consists essentially in the combination of anarmature and an electro-magnet with a pivoted or tilting platform orbase-plate.

Other features of theinvention will be hereinafter described in detail,and pointed outin the claims.

1n lheaccompanying drawings,Figure l represents a side view of anelectrical apparatus embodying my invention, and Fig.2 a sectional viewtaken on the line :c x of Fig. 1.

In the example shown in the drawings the plattorm or base-plate ispivoted to a suitable., support through the medium ot a rod, al', andeye u?, the latter secured to the platform or base-plate and turning onthe rod. The platform or base-plate carries the attached magnets b andc, and also devices for supporting a. pivoted armature, which devicesconsist ot' standards c c, between which is pivoted an arm, d, themotion of which is limited by arranging one of its ends in a notchprovided in a standarthj'. The arm d carries thc armature, which isattracted by the magnets when they are vitalized by the passage throughthem of the electric current. In the present instance the armature ismade in the form of a cylinder, as at g h, with oblique ends or bases,'so that the length ofthe cylinder is unequal, increasing1 at each endfrom its least length to its greatestlength, and the cylinder isarranged to be 'turned about its aXis by means of a finger-button, 7i',and a pulley and belt, as shown. The mass or side ofthe armaturepresented to the magnets is thus made unequal, according to the portionof the circumference turned toward the magnets, so that when thecurrentpassing through the magnet (No model.)

is weak and the attractive force of said magnet is consequently smallthe armature may be turned to present its greatest mass to the action ofsaid magnets, thus compensating for the weakness of the current, It theattracting force ofthe magnet is powerful, the armature is set so thatits least mass is presented to the magnets. 'When the current throughthe magnets is broken the armature is retracted to free it from contactwith the magnets, and this may he effected through the medium otv aspring, t', but if the action of the spring is not sufficient to raisethe armature Jfrom contact with the magnet theinstrument is placed in aninclined position, whereby the spring is not compelled to overcome theentire weight of the armature, while by turning the pivoted or tiltingplatform t0 a vertical position or turningiheinstrumentupsidedown theweight of the armature itself will serve to retract it from contact withthe magnets when the electric current ceases to pass through the latter.

By'means ofthe pivoted or tilting platform the retraction of thearmature from the magnets may be eifected by the weight ofthe armatureitself acting to retract or draw the armature from the magnets-as, forinstance, when the platform stands in a vertical position, or whentheinstrument is turned upsidedown, as before stated, and when the platform stands in a vertical position it will he obvious that theretractile force of the armature can be varied by changing the angle ofthe platform, thereby -increasing or diminishing the tendency ot' thearmature to retract itself from the magnets.

Ordinarily the retractile force ot' the armature is adjusted by a springthe tension of which is changed through the medium of a setscrew, whichl dispense with, as the adjustment of the armature can be effected bythe pivoted or tilting platform, and the power ot' the spring is neverchanged. By centrally pivoting the platform a large rangeot' adjustmentis rendered possible.

Having thus described my invention and eicient means for carrying itinto effect, what I cla-im is- 1. in combination with a suitablesupport, a relay-instrument hinged or pivoted thereon,

IOO

whereby the instmment may be adjused to In testimouywhereofl havehereunto set my any desired angle with relation to said suphand and sealin the presence of two subscribport', substantially as and for thepurpose ing Witnesses.

speced. THOMAS COCHRAN. lL. s]

2. The combination of an electro-magnet., an Witnesses:

adjustable armature, and a spring with a 'Llt- J. VAN SANTVOORD,

ing; platform, substantially as described. E. F. KASTENHBER.

